diff --git a/packages/@vue/cli-service/lib/config/base.js b/packages/@vue/cli-service/lib/config/base.js
index 82f35fdcea..c3c31fd45e 100644
--- a/packages/@vue/cli-service/lib/config/base.js
+++ b/packages/@vue/cli-service/lib/config/base.js
@@ -33,7 +33,7 @@ module.exports = (api, options) => {
         .end()
       .output
         .path(api.resolve(options.outputDir))
-        .filename(isLegacyBundle ? '[name]-legacy.js' : '[name].js')
+        .filename(isLegacyBundle ? '[name]-legacy.[hash:8].js' : '[name].[hash:8].js')
         .publicPath(options.baseUrl)
 
     webpackConfig.resolve